Dirk's suggestions regards Gustav & the mountain club is solid. You should go speak to them.
Same for most other comments. I would however disagree about the pockets of climbers. Yes, you get the poor students, but also the affluent businessmen. What is true is most of them like to go the cheap route.
My opinion it would be a nice 'alternative' activity on location, but not even close to a main income stream.
Keep in mind that in general climbers and most other 'holiday makers' don't mix well. Its not that they hate each other, they just have very little in common.
Suggested Plan of action:
* Book time with Gustav and spend a day climbing to get a better picture.
* Invite
experienced climbers to scout your crag to see if it is worth it.
* Spend the money to get it bolted.
* Bolt selectively - only good stuff.
* Bolt many routes (100+). If we can work through the route guide in one day you will see us only once.ii. Make day visiting free
* Keep your accommodation basic and cheap. Consider including camping.
* Make your money from selling chalk, tape, (maybe route guides). You will probably generate enough profit from this to buy food for the guard dog except if it is a great dane.
* If everything is free you will get more people.
* It helps if the owner / manager is a climber that knows the game.
If experienced climbers endorse the initiative (without getting a kickback) others will follow.
Good luck!